Work-clamp.



PATENTED MAR. 31, 1903.

n. c. FISHER. WORK CLAMP.

APPLICATION FILED JULY 28. 1902.

N0 MODEL.

WITNESSES m seams PiITEHS co, gworuuma, wnsmnmon, n c.

NITED STATES ATENT ()FFICE.

DANIEL O. FISHER, OF DORCHESTER, MASSACHUSETTS.

WORK-CL'AM P.

SPECIFICATION forming part of Letters Patent No. 724,091, dated March31, 1903;

7 Application filed July 28, 1902. Serial No, 117,234. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL Q. FISHER, of Dorchester, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Work-Clamps, of which the following is a specification.

This invention has for its object to provide a work holding or clampingtool by means of which the cost of labor and the expense of handling thework in a factory or machineshop may be greatly reduced. Its object islikewise to provide for the facilitation and convenience in handlingrelatively small parts of various sizes and shapes during variousoperations to which they may be subjected in the process of manufacture.

To this end the invention consists of a tool having certain features ofconstruction and relative arrangement of parts, all as illustrated uponthe drawings now to be described in detail and to be pointed out withparticularity in the claims hereto appended.

On the accompanying drawings, Figure 1 represents a front elevation ofmy improved tool and shows in end view a bar clamped thereby. Fig. 2represents a section on the line 2 2 of Fig. 1. Fig. 3 represents a planview of a tool. Fig. t illustrates the tool with the cam-lever raised torelease the work. Fig. 5 represents a section on the line 5 5 of Fig. 4.Fig. 6 represents a jaw which may beemployed in the intermediate memberand follower or the'two clamping members.

Referring to the drawings, it will be observed that the tool is providedwith the main casting, body, or frame a, from the end of which projectsa handle a, integral therewith. Secured to the ends of this casting orframe are twoscrews b b, which project therethrough and aresubstantially rigid therewith;

The heads of these screws may be forced into countersinks inthe mainframe or body. These screws are held against rotation, and theyadjustably support a clamping member or follower c, which has a limitedrocking movement relatively of the said screws.- The said clampingmember or follower is provided with enlarged apertures 0, through whichthe threaded portions of the screws loosely pass. Between the ends ofthe follower and flanges or lugs 0 secured thereto by screws 0 there arespherical nuts cl, arranged in semispherical apertures, as shown in Fig.5. Each nut has a circumferential milled flange d,Whereby it may berotated, and it is adapted, of course, to receive the screw. By thisprovision the follower may be rocked upon an axis transverse thereof orupon an axis longitudinal thereof. 7

Between the clamping member or follower c and the bodya there is a looseintermediate or clamping member e, having enlarged apertures throughwhich the unthreaded portions of the screws pass. It and the member 0are formed with undercut grooves e 0, respectively, for the reception ofmovable jaws ff, by which the work may be engaged. These jaws arepreferably hardened and may be Hat on their operative surfaces, asillustrated in Figs. 1 and 4, or else they may be provided withrectangular grooves in their faces, as shown in Fig. 6, for clamping thework. The said jaws may be varied in many ways to accommodate variousforms of work or for preventing injury to such finished work as may beheld in the tool. The intermediate or clamping member e is adapted to beforced against the work in a direction toward the follower or member 0by means of a cam-lever g. This lever is fulc'rumed on a stud g in thebody-a, and its cam portion g passes through a slot in said body andbears against the outer face of the member e.

The handle portion of the lever g is conveniently located with respectto the handle a so that the tool may be grasped in the hand of anoperator or mechanic and forced together from the position shown in Fig.4 to .the position shown in Fig. 1. Both handles are in the'form'of aneasy curve to enable them to be grasped conveniently and withoutundueexertion on the part of the oper ator. The handle a." is provided with alug a which operates to limit the extent of movement of the handle orleverg when it is being moved to operative position.

From the foregoing description it will be observed that in the toolthusdisclosed there is a perfect adjustment of the member 0, wherebyv theremay be clamped in the tool both regular and irregular formations withequal facility.

Having thus explained the nature of the invention and described a way ofconstructing and using the same, although without attempting to setforth all of the forms in which it may be made or all of the modes ofits use, I declare that what I claim is-- 1. A tool of the characterdescribed comprising a body having a handle, screws attached to saidbody, a follower through which said screws loosely pass, spherical nutssupported in complemeuta'l sockets in said follower, an intermediate orclamping member loosely supported by said screws, and an operating-leverfor forcing said intermediate member toward said follower, said leverhaving a handle in convenient proximity to the handle of the body sothat both may be grasped in the hand of an operator.

2. A tool of the character described comprising a body having a handleprojecting from the end thereof, screws attached to the ends of saidbody, a clamp member or follower having nuts in threaded engagement withsaid screws, an intermediate clamping member having apertures th roughwhich said screws loosely pass, and a cam-lever pivoted to said body andhaving an operative portion passing through a slot in said body andbearing against said intermediate member at a point between the screws,said lever having a handle in convenient proximity to the bandle of saidbody.

3. A tool of the character described comprising a body having a handleprojecting from the end thereof, screws attached to the ends of saidbody, a clamp member or follower having nuts in threaded engagement withsaid screws, an intermediate clamping member having apertures throughwhich said screws loosely pass, a cam-lever pivoted to said body andhaving an operative portion passing through a slot in said body and hearing against said intermediate member at a point between the screws, saidlever having a handle in convenient proximity to the handle of saidbody,and removable coacting jaws carried by said follower and saidintermediate member.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

DANIEL O. FISHER.

\Vitnesses:

MARoUs 13. MAY, J. P. Inn.

